When we see records being broken and unprecedented events such as this, the onus is on those who deny any connection to climate change to prove their case. Global warming has fundamentally altered the background conditions that give rise to all weather. In the strictest sense, all weather is now connected to climate change. Kevin Trenberth

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"Is climate change already dangerous?"

by David Spratt, Climate Code Red, September 16, 2013

In a compelling survey, this report answers the question many are afraid to ask: is climate change already dangerous?
This science survey measures the
current manifestations and impacts of climate change against the "safe
boundaries" metric; surveys the literature on tipping points and
non-linear climate events; and provides a detail study of significant
recent events in the Arctic.
Three big questions are asked and answered:
• Is climate change dangerous for just the current increase in global temperature?• Is climate change dangerous for the further increases in temperature already implied by the current level of greenhouse gases?
• By looking at events in climate
history where greenhouse gas levels were similar to today, can further
light be shone on the "already dangerous" question? The answers
are both shocking, and necessary, if climate policy-making is to escape
the delusional paradigm within which it is stuck.
In a concluding section, this
report argues that with clear evidence that climate change is already
dangerous, we are in an emergency and face "…an unavoidably radical
future." And we know from past experience that societies, once in
emergency mode, are capable of facing up to and solving seemingly
impossible problems.